Bi-functional rake



FIG. 1 is a top plan view of a bi-functional rake showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left-side elevational view thereof; the right-side elevational view being a mirror image of the left-side elevational view thereof;

FIG. 4 is a bottom plan view thereof; a handle is shown in broken lines for illustrative purposes only and forms no part of the claimed design, and;

FIG. 5 is a front elevational view thereof. 

The ornamental design for a bi-functional rake, as shown and described. 